摘要
针对开关磁阻电动机的转矩脉动较大的问题,对直接瞬时转矩控制方法进行了研究,并将其与PWM控制方法相结合,进一步介绍了一种改进型的控制方法。对两种控制方法的工作原理展开分析,重点介绍了转矩差值控制环节,它是依据转子角度位置的不同,将电动机的相绕组电感分为三个区间,并通过编程实现各个区间内电动机的控制。通过Matlab/Simulink软件分别搭建了四相8/6极开关磁阻电动机的直接瞬时转矩控制和改进型直接瞬时转矩控制的仿真模型,其中,瞬时反馈转矩是由相电流、转子位置和转矩三者之间的关系表查表得到。研究结果表明,两种方法都能够对转矩脉动起到抑制作用,但相比较而言,改进型直接瞬时转矩控制方法的抑制效果更加明显。
Aiming at the high torque ripple of the switched reluctance motor （ SRM）, the direct instantaneous torque control （DITC） scheme and the advanced direct instantaneous torque control （ADITC） scheme which composed of the DITC and the PWM control method were pres-ented in the paper. The operational principle of DITC and ADITC were analysed. According to the rotor position, the phase winding inductance was divided into three intervals. As the focus of DITC and ADITC, the torque hysteresis controller was implemented through programming at every interval. The control simulation models for the four-phase 8/6 SRM were built up in Matlab/Simulink environment. The instantaneous feedback torque was obtained through the lookup table, which shows the relationship between the phase current, rotor position and torque. The results indicate that the proposed two methods can all reduce the inherent torque ripple, but the ADITC scheme is proved to be more excellent.
出处
《机电工程》
CAS
2015年第5期626-631,共6页
Journal of Mechanical & Electrical Engineering
基金
国家自然科学基金资助项目(61273086)
浙江省自然科学基金资助项目(LY12E07001)
关键词
开关磁阻电动机
直接瞬时转矩控制
改进型直接瞬时转矩控制
仿真
switched reluctance motor （ SRM ）
direct instantaneous torque control （ DITC ）
advanced direct instantaneous torque control （ADITC）
simulation
